<!--
  Copyright (c) 2006-2013, JGraph Ltd
  
  Monitor example for mxGraph. This eample demonstrates using a
  graph to display the current state of a workflow.
-->
<html>
<head>
	<title>mxGraph Workflow Monitor</title>

	<!-- Sets the basepath for the library if not in same directory -->
	<script type="text/javascript">
		mxBasePath = '../src';
	</script>

	<!-- Loads and initializes the library -->
	<script type="text/javascript" src="../src/js/mxClient.js"></script>

	<!-- Example code -->
	<script type="text/javascript">
		// Program starts here. Creates a sample graph in the
		// DOM node with the specified ID. This function is invoked
		// from the onLoad event handler of the document (see below).
		function main(container)
		{
			// Checks if the browser is supported
			if (!mxClient.isBrowserSupported())
			{
				// Displays an error message if the browser is not supported.
				mxUtils.error('Browser is not supported!', 200, false);
			}
			else
			{
				mxConstants.SHADOWCOLOR = '#e0e0e0';
				
				// Creates the graph inside the given container
				var graph = createGraph(container);

				// Creates a process display using the activity names as IDs to refer to the elements
				var xml = '<mxGraphModel><root><mxCell id="0"/><mxCell id="1" parent="0"/>'+
					'<mxCell id="2" value="Claim Handling Process" style="swimlane" vertex="1" parent="1"><mxGeometry x="1" width="850" height="400" as="geometry"/></mxCell>'+
					'<mxCell id="3" value="Claim Manager" style="swimlane" vertex="1" parent="2"><mxGeometry x="30" width="820" height="200" as="geometry"/></mxCell>'+
					'<mxCell id="5" value="" style="start" vertex="1" parent="3"><mxGeometry x="40" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="AuthorizeClaim" value="Authorize&#xa;Claim" vertex="1" parent="3"><mxGeometry x="90" y="80" width="100" height="40" as="geometry"/></mxCell>'+
					'<mxCell id="6" value="X" style="step" vertex="1" parent="3"><mxGeometry x="210" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="ApproveClaim" value="Approve&#xa;Claim" vertex="1" parent="3"><mxGeometry x="260" y="80" width="100" height="40" as="geometry"/></mxCell>'+
					'<mxCell id="7" value="X" style="step" vertex="1" parent="3"><mxGeometry x="380" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="8" value="" edge="1" parent="3" source="5" target="AuthorizeClaim"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="9" value="" edge="1" parent="3" source="AuthorizeClaim" target="6"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="10" value="" edge="1" parent="3" source="6" target="ApproveClaim"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="11" value="" edge="1" parent="3" source="ApproveClaim" target="7"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="12" value="" edge="1" parent="3" source="7" target="AuthorizeClaim"><mxGeometry relative="1" as="geometry"><Array as="points"><mxPoint x="140" y="40"/></Array></mxGeometry></mxCell>'+
					'<mxCell id="ReviewClaim" value="Review&#xa;Claim" vertex="1" parent="3"><mxGeometry x="480" y="80" width="100" height="40" as="geometry"/></mxCell>'+
					'<mxCell id="22" value="X" style="step" vertex="1" parent="3"><mxGeometry x="600" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="23" value="" edge="1" parent="3" source="ReviewClaim" target="22"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="ApproveReviewedClaim" value="Approve Rev.&#xa;Claim" vertex="1" parent="3"><mxGeometry x="650" y="80" width="100" height="40" as="geometry"/></mxCell>'+
					'<mxCell id="26" value="" edge="1" parent="3" source="22" target="ApproveReviewedClaim"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="27" value="X" style="step" vertex="1" parent="3"><mxGeometry x="770" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="28" value="" edge="1" target="27" parent="3" source="ApproveReviewedClaim"><mxGeometry relative="1" as="geometry"><mxPoint x="740" y="100" as="sourcePoint"/><mxPoint x="760" y="100" as="targetPoint"/></mxGeometry></mxCell>'+
					'<mxCell id="32" value="" edge="1" parent="3" source="27" target="ReviewClaim"><mxGeometry relative="1" as="geometry"><Array as="points"><mxPoint x="665" y="160"/></Array></mxGeometry></mxCell>'+
					'<mxCell id="4" value="Accountant" style="swimlane" vertex="1" parent="2"><mxGeometry x="30" y="200" width="820" height="200" as="geometry"/></mxCell>'+
					'<mxCell id="EnterAccountingData" value="Enter&#xa;Data" vertex="1" parent="4"><mxGeometry x="430" y="80" width="100" height="40" as="geometry"/></mxCell>'+
					'<mxCell id="14" value="X" style="step" vertex="1" parent="4"><mxGeometry x="550" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="15" value="" edge="1" parent="4" source="EnterAccountingData" target="14"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="CheckAccountingData" value="Check&#xa;Data" vertex="1" parent="4"><mxGeometry x="600" y="80" width="100" height="40" as="geometry"/></mxCell>'+
					'<mxCell id="16" value="" edge="1" parent="4" source="14" target="CheckAccountingData"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="17" value="X" style="step" vertex="1" parent="4"><mxGeometry x="720" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="18" value="" edge="1" parent="4" source="CheckAccountingData" target="17"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="19" value="" style="end" vertex="1" parent="4"><mxGeometry x="770" y="85" width="30" height="30" as="geometry"/></mxCell>'+
					'<mxCell id="20" value="" edge="1" parent="4" source="17" target="19"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="31" value="" edge="1" parent="4" source="17" target="EnterAccountingData"><mxGeometry relative="1" as="geometry"><Array as="points"><mxPoint x="625" y="160"/></Array></mxGeometry></mxCell>'+
					'<mxCell id="13" value="" edge="1" parent="2" source="7" target="EnterAccountingData"><mxGeometry relative="1" as="geometry"/></mxCell>'+
					'<mxCell id="24" value="" edge="1" parent="2" source="14" target="ReviewClaim" style="edgeStyle=none"><mxGeometry relative="1" as="geometry"><Array as="points"><mxPoint x="595" y="180"/><mxPoint x="480" y="180"/><mxPoint x="480" y="100"/></Array></mxGeometry></mxCell>'+
					'<mxCell id="29" value="" edge="1" parent="2" source="22" target="EnterAccountingData"><mxGeometry relative="1" as="geometry"><Array as="points"><mxPoint x="469" y="40"/></Array></mxGeometry></mxCell>'+
					'<mxCell id="30" value="" edge="1" parent="2" source="27" target="EnterAccountingData"><mxGeometry relative="1" as="geometry"><Array as="points"><mxPoint x="469" y="40"/></Array></mxGeometry></mxCell>'+
					'<mxCell id="33" value="" edge="1" parent="2" source="6" target="EnterAccountingData"><mxGeometry relative="1" as="geometry"><Array as="points"><mxPoint x="255" y="200"/></Array></mxGeometry></mxCell>'+
					'</root></mxGraphModel>';
				var doc = mxUtils.parseXml(xml);
				var codec = new mxCodec(doc);
				codec.decode(doc.documentElement, graph.getModel());
			}
			
			// Creates a button to invoke the refresh function
			document.body.appendChild(mxUtils.button('Update', function(evt)
			{
				// XML is normally fetched from URL at server using mxUtils.get - this is a client-side
				// string with randomized states to demonstrate the idea of the workflow monitor
				var xml = '<process><update id="ApproveClaim" state="'+getState()+'"/><update id="AuthorizeClaim" state="'+getState()+'"/>'+
					'<update id="CheckAccountingData" state="'+getState()+'"/><update id="ReviewClaim" state="'+getState()+'"/>'+
					'<update id="ApproveReviewedClaim" state="'+getState()+'"/><update id="EnterAccountingData" state="'+getState()+'"/></process>';
				update(graph, xml);
			}));
		};

		/**
		 * Updates the display of the given graph using the XML data
		 */
		function update(graph, xml)
		{
			if (xml != null && xml.length > 0)
			{
				var doc = mxUtils.parseXml(xml);
				
				if (doc != null && doc.documentElement != null)
				{
					var model = graph.getModel();
					var nodes = doc.documentElement.getElementsByTagName('update');
					
					if (nodes != null && nodes.length > 0)
					{
						model.beginUpdate();

						try
						{
							for (var i = 0; i < nodes.length; i++)
							{
								// Processes the activity nodes inside the process node
								var id = nodes[i].getAttribute('id');
								var state = nodes[i].getAttribute('state');
								
								// Gets the cell for the given activity name from the model
								var cell = model.getCell(id);
								
								// Updates the cell color and adds some tooltip information
								if (cell != null)
								{
									// Resets the fillcolor and the overlay
									graph.setCellStyles(mxConstants.STYLE_FILLCOLOR, 'white', [cell]);
									graph.removeCellOverlays(cell);
			
									// Changes the cell color for the known states
									if (state == 'Running')
									{
										graph.setCellStyles(mxConstants.STYLE_FILLCOLOR, '#f8cecc', [cell]);
									}
									else if (state == 'Waiting')
									{
										graph.setCellStyles(mxConstants.STYLE_FILLCOLOR, '#fff2cc', [cell]);
									}
									else if (state == 'Completed')
									{
										graph.setCellStyles(mxConstants.STYLE_FILLCOLOR, '#d4e1f5', [cell]);
									}
									
									// Adds tooltip information using an overlay icon
									if (state != 'Init')
									{
										// Sets the overlay for the cell in the graph
										graph.addCellOverlay(cell, createOverlay(graph.warningImage, 'State: '+state));
									}
								}
							} // for
						}
						finally
						{
							model.endUpdate();
						}
					}
				}
			}
		};
		
		/**
		 * Creates an overlay object using the given tooltip and text for the alert window
		 * which is being displayed on click.
		 */
		function createOverlay(image, tooltip)
		{
			var overlay = new mxCellOverlay(image, tooltip);

			// Installs a handler for clicks on the overlay
			overlay.addListener(mxEvent.CLICK, function(sender, evt)
			{
				mxUtils.alert(tooltip + '\nLast update: ' + new Date());
			});
			
			return overlay;
		};
		
		/**
		 * Creates and returns an empty graph inside the given container.
		 */
		function createGraph(container)
		{
			var graph = new mxGraph(container);
			graph.setTooltips(true);
			graph.setEnabled(false);
			
			// Disables folding
			graph.isCellFoldable = function(cell, collapse)
			{
				return false;
			};

			// Creates the stylesheet for the process display
			var style = graph.getStylesheet().getDefaultVertexStyle();
			style[mxConstants.STYLE_FONTSIZE] = 11;
			style[mxConstants.STYLE_FONTCOLOR] = 'black';
			style[mxConstants.STYLE_STROKECOLOR] = '#808080';
			style[mxConstants.STYLE_FILLCOLOR] = 'white';
			style[mxConstants.STYLE_GRADIENTCOLOR] = 'white';
			style[mxConstants.STYLE_GRADIENT_DIRECTION] = mxConstants.DIRECTION_EAST;
			style[mxConstants.STYLE_ROUNDED] = true;
			style[mxConstants.STYLE_SHADOW] = true;
			style[mxConstants.STYLE_FONTSTYLE] = 1;
			
			style = graph.getStylesheet().getDefaultEdgeStyle();
			style[mxConstants.STYLE_EDGE] = mxEdgeStyle.ElbowConnector;
			style[mxConstants.STYLE_STROKECOLOR] = '#808080';
			style[mxConstants.STYLE_ROUNDED] = true;
			style[mxConstants.STYLE_SHADOW] = true;
							
			style = [];
			style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_SWIMLANE;
			style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;
			style[mxConstants.STYLE_STROKECOLOR] = '#a0a0a0';
			style[mxConstants.STYLE_FONTCOLOR] = '#606060';
			style[mxConstants.STYLE_FILLCOLOR] = '#E0E0DF';
			style[mxConstants.STYLE_GRADIENTCOLOR] = 'white';
			style[mxConstants.STYLE_STARTSIZE] = 30;
			style[mxConstants.STYLE_ROUNDED] = false;
			style[mxConstants.STYLE_FONTSIZE] = 12;
			style[mxConstants.STYLE_FONTSTYLE] = 0;
			style[mxConstants.STYLE_HORIZONTAL] = false;
			// To improve text quality for vertical labels in some old IE versions...
			style[mxConstants.STYLE_LABEL_BACKGROUNDCOLOR] = '#efefef';

			graph.getStylesheet().putCellStyle('swimlane', style);
			
			style = [];
			style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_RHOMBUS;
			style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RhombusPerimeter;
			style[mxConstants.STYLE_STROKECOLOR] = '#91BCC0';
			style[mxConstants.STYLE_FONTCOLOR] = 'gray';
			style[mxConstants.STYLE_FILLCOLOR] = '#91BCC0';
			style[mxConstants.STYLE_GRADIENTCOLOR] = 'white';
			style[mxConstants.STYLE_ALIGN] = mxConstants.ALIGN_CENTER;
			style[mxConstants.STYLE_VERTICAL_ALIGN] = mxConstants.ALIGN_MIDDLE;
			style[mxConstants.STYLE_FONTSIZE] = 16;
			graph.getStylesheet().putCellStyle('step', style);
			
			style = [];
			style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_ELLIPSE;
			style[mxConstants.STYLE_PERIMETER] = mxPerimeter.EllipsePerimeter;
			style[mxConstants.STYLE_FONTCOLOR] = 'gray';
			style[mxConstants.STYLE_FILLCOLOR] = '#A0C88F';
			style[mxConstants.STYLE_GRADIENTCOLOR] = 'white';
			style[mxConstants.STYLE_STROKECOLOR] = '#A0C88F';
			style[mxConstants.STYLE_ALIGN] = mxConstants.ALIGN_CENTER;
			style[mxConstants.STYLE_VERTICAL_ALIGN] = mxConstants.ALIGN_MIDDLE;
			style[mxConstants.STYLE_FONTSIZE] = 16;
			graph.getStylesheet().putCellStyle('start', style);
			
			style = mxUtils.clone(style);
			style[mxConstants.STYLE_FILLCOLOR] = '#DACCBC';
			style[mxConstants.STYLE_STROKECOLOR] = '#AF7F73';
			graph.getStylesheet().putCellStyle('end', style);
			
			return graph;
		};
		
		/**
		 * Returns a random state.
		 */
		function getState()
		{
			var state = 'Init';
			var rnd = Math.random() * 4;
			
			if (rnd > 3)
			{
				state = 'Completed';
			}
			else if (rnd > 2)
			{
				state = 'Running';
			}
			else if (rnd > 1)
			{
				state = 'Waiting';
			}
			
			return state;
		};
	</script>
</head>

<!-- Page passes the container and control to the main function -->
<body onload="main(document.getElementById('graphContainer'));">

	<!-- Acts as a container for the graph -->
	<div id="graphContainer" style="overflow:hidden;position:relative;width:861px;height:406px;cursor:default;">
	</div>
	<br>
</body>
</html>
